textproduct: Quad Cities

KEY MESSAGES

- A respite from the recent rainy pattern will be seen the second half of the week but some isolated showers cannot be ruled out. There are indications the rainy pattern may return late this weekend and into next week influenced by tropical moisture.

- The cooler than normal trend, especially with daytime temperatures, will continue with some moderation by the weekend.

SHORT TERM /THROUGH WEDNESDAY/

Issued at 159 PM CDT Tue Sep 22 2026

Lingering showers will continue to dissipate through sunset as the upper low moves into the Great Lakes. Low level easterly flow will keep clouds around through the night and into Wednesday along with the risk of an isolated shower. However, there will be breaks in the clouds so some sunshine should be seen at times, especially on Wednesday.

LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/

Issued at 159 PM CDT Tue Sep 22 2026

Thursday through Tuesday Assessment...medium to high (50-70%) confidence on moderating temperatures. Medium (40-60%) confidence of the wet pattern returning

Low level easterly flow will push moisture west from the nor'easter on the east coast. While the forecast is mainly dry through Friday, some isolated diurnally driven showers cannot be fully ruled out.

Starting Friday night but especially from Sunday on, the global models are showing tropical moisture getting pulled north from the systems in the eastern Pacific along with some moisture from the western Gulf.

The stronger moisture transport is initially across central and western Iowa so any rain chances for eastern Iowa would be west of a line from Dubuque, IA to Keokuk, IA through the weekend. However, by early next week the tropical moisture transport increases considerably. With the MJO progged to be cycling between phase 1 and 8, this increases the probability that the area may experience another period of above normal rainfall.

Given the very wet pattern we are just completing, another period of above normal rainfall may prolong already high water levels on area rivers.

AVIATION /00Z TAFS THROUGH 00Z THURSDAY/

Issued at 600 PM CDT Tue Sep 22 2026

MVFR/low VFR clouds will continue to move west into central IA, as upper low slowly moves east into northern Indiana. Despite a very moist boundary layer, easterly winds above 5kts will keep any fog potential at bay for now. Low level easterly flow to remain through the period, with a mix of sun/clouds expected Wednesday afternoon.

DVN WATCHES/WARNINGS/ADVISORIES

IA...None. IL...None. MO...None.